321444424 has 16 divisors (see below), whose sum is σ = 688809600. Its totient is φ = 137761872.

The previous prime is 321444401. The next prime is 321444437. The reversal of 321444424 is 424444123.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 321444392 and 321444401.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2869984 + ... + 2870095.

It is an arithmetic number, because the mean of its divisors is an integer number (43050600).

Almost surely, 2^321444424 is an apocalyptic number.

It is an amenable number.

321444424 is an abundant number, since it is smaller than the sum of its proper divisors (367365176).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

321444424 is a wasteful number, since it uses less digits than its factorization.

321444424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5740092 (or 5740088 counting only the distinct ones).

The product of its digits is 12288, while the sum is 28.

The square root of 321444424 is about 17928.8712416594. The cubic root of 321444424 is about 685.0179717167.

Adding to 321444424 its reverse (424444123), we get a palindrome (745888547).

The spelling of 321444424 in words is "three hundred twenty-one million, four hundred forty-four thousand, four hundred twenty-four".